| 摘要 |
A static and closed solution casting process comprises the following steps: dissolve a solute in a solvent to prepare a casting solution; place membrane-casting plate on bracket, and adjust the bracket to make the membrane-casting plate horizontal; pour the casting solution into membrane-casting plate such that the casting solution is uniformly spread out in the membrane-casting plate; arrange heating arrangement over the membrane-casting plate; arrange cooling side plate around the membrane-casting plate; arrange cooling bottom plate below the membrane-casting plate; supply cooling liquor to the connected interlayer of the cooling side plate and the cooling bottom plate; enclose the membrane-casting plate, the bracket, the heating arrangement, the cooling side plate and the cooling bottom plate inside an insulated case made by heat insulator; heat the casting solution in the membrane-casting plate by driving the heating arrangement to totally evaporate the solvent in the casting solution; and then continuously heat in order to enhance the crystallinity of the final membrane; stop heating; and remove the condensed solvent from the cooling bottom plate and peel the final membrane from the membrane-casting plate. This process is of simple technique, cheap equipment and low cost of membrane preparation, and the final membrane has the advantages such as high crystallinity and isotropic etc.
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